Shelter



FIG. 1 is a rear and left side perspective view of a shelter showing mynew design;

FIG. 2 is a front and left side perspective view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a front elevation view thereof.

The ornamental design for a shelter, as shown and described.